Finding Sum using Recursive Function

Q. 105. Program to find the Sum of first 'n' natural numbers using Recursive function.

Copy Code:

#include <iostream>

using namespace std;

int sum(int n)

   {

      int f;

      if (n==1)

         return (1);

      else 

         f = n + sum (n-1);

         return (f);

   }

int main()

{

 int n;

 cout << "Enter any Positive Number : ";

 cin >> n;

 cout << "Sum of first " << n << " numbers is : " << sum(n);

 return 0;

}